/*
 * Copyright (c) 2022-2022 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _LOS_CREDENTIALS_H
#define _LOS_CREDENTIALS_H

#include "asm/atomic.h"
#include "los_list.h"
#include "los_process_pri.h"

#ifdef LOSCFG_USER_CONTAINER
struct UserContainer;

typedef struct Credentials {
    atomic_t count;
    UINT32 uid;
    UINT32 gid;
    UINT32 euid;
    UINT32 egid;
    struct UserContainer *userContainer;
} Credentials;

extern Credentials g_rootCredentials;

Credentials *CreateCredentials(void);

Credentials *PrepareCredential(LosProcessCB *runProcessCB);

INT32 CopyCredentials(unsigned long flags,  LosProcessCB *childProcessCB, LosProcessCB *runProcessCB);

void FreeCredentials(Credentials *credentials);

void ExitProcessCredentials(LosProcessCB *processCB);

static inline Credentials *GetCredentials(Credentials *cred)
{
    atomic_inc(&cred->count);
    return cred;
}

static inline void DerefCredentials(Credentials *credentials)
{
    if (credentials) {
        if (atomic_dec_and_test(&credentials->count)) {
            FreeCredentials(credentials);
        }
    }
}

static inline Credentials *CurrentCredentials(void)
{
    Credentials *credentials = NULL;
    UINT32 intSave;

    intSave = LOS_IntLock();
    credentials = OsCurrProcessGet()->credentials;
    LOS_IntRestore(intSave);

    return credentials;
}

static inline struct UserContainer *CurrentUserContainer(void)
{
    struct UserContainer *userContainer = NULL;
    UINT32 intSave;

    intSave = LOS_IntLock();
    userContainer = CurrentCredentials()->userContainer;
    LOS_IntRestore(intSave);

    return userContainer;
}

INT32 CommitCredentials(Credentials *newCredentials);

INT32 UnShareUserContainer(unsigned long unshareFlags, LosProcessCB *runProcess);

INT32 SetnsUserContainer(struct UserContainer *targetContainer, LosProcessCB *runProcess);

#endif
#endif /* _LOS_CREDENTIALS_H */